P3

Question 1

like charges…

Answer 1

repel

Question 2

opposite charges

Answer 2

attract

Question 3

electric charges have what kind of field

Answer 3

an electric field

Question 4

electric fields cause what force?

Answer 4

an electrostatic force

Question 5

what 3 ways test whether an object has a static charge

Answer 5

see if it will pick up bits of paper
see whether it will change the direction of water flow
and a gold leaf electroscope

Question 6

charge=

Answer 6

current x time

Question 7

what does a variable resistor look like

Answer 7

a horizontal rectangle with an arrow through it

Question 8

a standard test circuit for an IV graph consists of…

Answer 8

a cell
an ammeter
a variable resistor
a voltmeter
the component you’re testing
wires

Question 9

Resistors and wires have what shape IV graph

Answer 9

constantly increasing (straight)

Question 10

filament lamps have what shape IV graph

Answer 10

an ‘f’ shape, it’s curvy

Question 11

diodes have what shape IV graph

Answer 11

a graph thats only in the positive, as soon as it goes negative, it has infinite resistance as diodes can only go one way, in the positive, as current increases, potential difference also rapidly increases.

Question 12

what does resistance do when temperature increases

Answer 12

increases

Question 13

a thermistor is a…

Answer 13

temperature dependent resistor